how block user from resetting O365 password in portal.office.com

[Marvin Oco]

how block user from resetting O365 password in portal.office.com?

only admins should be able to reset password

[#2]

AFAIK no if they are cloud only users, but I do believe you can prevent them from doing this from OWA:

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_o365admin-mso_manage/disable-password-ch...

There’s a uservoice for it here:

https://office365.uservoice.com/forums/273493-office-365-admin/suggestions/9202740-block-users-to-ch...

[#3]

Also! Do you mean resetting a expired / forgotten password or just changing it? The first mentioned is a feature that can be enabled / turned off